Routine tests during pregnancy cannot detect that your baby has fava bean disease and can be checked by genetic testing. Fava bean disease is a disease caused by the lack of glucose-6-phosphate dehydrogenase in the organism, it is an enzyme deficiency due to a gene mutation, and it is an X-chromosome-linked disease. The main clinical manifestation is hemolysis after eating fava beans or fava bean products, and dizziness, nausea, jaundice, hemoglobinuria, and other symptoms can occur. Routine obstetric examination during pregnancy is mainly to check the growth and development of the fetus, through ultrasound can check whether the fetus has abnormal organ development, serological screening to check whether there is a risk of chromosomal abnormality, etc. For genetic lesions, it is necessary to amniotic fluid through the corresponding gene locus test to be clear, ordinary obstetric examination can not be detected. If there is a family history of serosanguineous disease, it is recommended to go to a prenatal diagnosis center or genetic clinic for further consultation during pregnancy.